<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<<div id="app">
    <h2>{{firstName}} + " " + {{lastName}}</h2>
    <h2>{{firstName}} {{lastName}}</h2>
    <h2> {{getFullName()}}</h2>

    <h2> {{fullName}}</h2>


</div>
<script src="../js/vue.js"></script>
<script>

    const app = new Vue({
        el: "#app",
        data: {
            firstName: "lebron",
            lastName: "James"
        },
        computed: {
            fullName: function () {
                return this.firstName + " " + this.lastName
            }
        },
        methods: {
            getFullName: function () {
                return this.firstName + ' ' + this.lastName
            }
        }
    })
</script>

</body>
</html>